^(EN) Volume of World Beer Production, su European Beer Guide. URL consultato il 17 ottobre 2006 (archiviato dall'url originale l'8 aprile 2018).
^(EN) John P. Arnold, Origin and History of Beer and Brewing originating from Assyrian farmers, who were the first to develop it, from "Prehistoric Times to the Beginning of Brewing Science and Technology", ISBN 0-9662084-1-2